Picker for looms



.J :ly 28, 1936. BURGERSTEIN PICKER FOR LooMs Filed oct. 14, 1935 finie/iw? dw l I g Patented July 28, 1936 UNITE ST S Arai" orig PICKER FOR LOOMS Lothar Burgersten, Rapperswil-Jona, Switzerland 1 Claim.

This invention relates to pickers for looms comprising a guide sleeve surrounding the picking spindle and a slot-like aperture situated below said sleeve for receiving the picking member.

To pickers of this kind the drawback is inherent that the side walls of the center portion of the guide sleeve, which walls terminate at the slot so that the sleeve opens thereto, have the tendency to warp and distort from the ends of the slot towards the middle thereof, due to lacking proper staying and in consequence of the particular properties of the raw hide used as structural material for the picker. Therefore jamming sets in between the guide sleeve and the picking spindle even when the diameter of this sleeve is made larger than the diameter of the spindle, so that the reciprocating sliding movement of the picker on the spindle is hampered and accumulations of dirt are caused to form which are liable to soil the fabric. In cases like this the picker must be taken off the loom and bored out in an endeavor to make it t for further use, which procedure is complicated and time-wasting.

According to the present invention this drawback is eliminated in the picker by concaving the inner flanks of the side walls of the guide sleeve center portion, which open to the slot, from the ends of the slot towards the middle thereof and diverging these flanks from a horizontal middle plane passed through the bore of the sleeve downwardly outwardly.

In this way these side walls are vaulted and thus prevented from sagging inwardly so that, even if after a long time of use deformation of the picker should set in, no jamming between the same and the picking spindle can take place. Consequently, the diameter of the bore of the guide sleeve can be made exactly the same as the diameter of the picker spindle, so that proper guidance is provided for the picker from the start. Owing to this improved guidance the picker as well as the picking stick are preserved. Furthermore, accumulations of dirt are prevented in the widened space between the side walls and the picker spindle, as the dirt is caused to drop down. Moreover, by effect of the widened space the cooling of the picking spindle is improved.

In the accompanying drawing a constructional III- III in Fig. 1.

The picker l illustrated in the drawing, which is provided at the upper end of its body with a l guide sleeve 2 for sliding along a picking spindle F and with a lower striker end in the form of a pocket 3, is wound from individual layers of raw hide and then compressed, the various layers constituting the body of the picker being held l5 together by means of rivets Il. Below the guide sleeve an aperture or slot 6 for the reception of the picking member is arranged in a central disposition. The bore 5 of the guide sleeve has the same diameter as the picking spindle F which it surrounds. The center portion of the guide sleeve opens to one side of the slot 6, the inner flanks 2m diverge downwardly outwardly from a horizontal middle plane passed through the bore of the .sleeve and are concaved from the ends of the slot towards the middle thereof, as evident ,from Fig. 3, so that even on deformation setting in during the operation these flanks are prevented from touching the picking spindle and thereby causing jamming.

I do not limit myself to the particular size, shape, number or arrangement of parts as` shown and described, all of which may be varied without going beyond the scope of my invention as shown, described and claimed.

What I claim is:

In a picker for looms, a picker body having a slot-like aperture for the reception of the picking member, a guide sleeve for engagement with the picking spindle arranged at the upper end of said body above said aperture with its center portion opening to one side of the latter, and side walls provided for said opened guide sleeve center portion to terminate at said side of said aperture and being concaved from the ends of said aperture to the middle thereof and diverging from a horizontal middle plane through the bore of said sleeve downwardly outwardly.

LOTHAR BURGERSTEIN. 

